[go: up one dir, main page]

WO2016112530A1 - Procédé et dispositif de gestion de mobilité - Google Patents

Procédé et dispositif de gestion de mobilité Download PDF

Info

Publication number
WO2016112530A1
WO2016112530A1 PCT/CN2015/070856 CN2015070856W WO2016112530A1 WO 2016112530 A1 WO2016112530 A1 WO 2016112530A1 CN 2015070856 W CN2015070856 W CN 2015070856W WO 2016112530 A1 WO2016112530 A1 WO 2016112530A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
frequency
signal quality
case
handover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/070856
Other languages
English (en)
Inventor
Min Huang
Hui Guo
Yang Liu
Jiying Xu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to US15/532,178 priority Critical patent/US9980196B2/en
Priority to PCT/CN2015/070856 priority patent/WO2016112530A1/fr
Priority to CN201580073567.4A priority patent/CN107431975B/zh
Priority to EP15877449.7A priority patent/EP3245817A4/fr
Publication of WO2016112530A1 publication Critical patent/WO2016112530A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0094—Definition of hand-off measurement parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/20—Performing reselection for specific purposes for optimising the interference level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present technology generally relates to radio communication, particularly to a method for mobility management and the device thereof.
  • LTE-A Long Term Evolution-Advanced
  • BS base station
  • eNB evolved Node B
  • CC component carrier
  • the bandwidths of frequency bands that are available in LTE are 1.4 MHz, 3.0 MHz, 5.0 MHz, 10 MHz, 15 MHz, and 20 MHz. Accordingly, if five bands of 20 MHz are aggregated as component carriers, a communication channel of 100 MHz in total can be formed.
  • LTE-A HetNet scenarios e.g., a number of small cells, such as micro cell, pico cells and/or femto cells are deployed on top of the regular macro cells, the same carrier frequency is applied for sake of spectrum efficiency.
  • one positive bias generally the value is 6dB or 9dB
  • This is equivalent to expanding the cell range of the small cell when a UE takes handover between the macro cell and the small cell. This technique is called cell range extension (CRE) .
  • CRE cell range extension
  • a number of overlapping cells are deployed by both macro-eNB and small-eNB (such as micro-eNB, pico-eNB or femto-eNB) , one cell at one frequency carrier, as shown in Figure 1.
  • Cell 1 and cell 2 are deployed by one macro-eNB, with cell 1 over frequency 1 and cell 2 over frequency 2 respectively, while cell 3 and cell 4 are deployed by one small-eNB, with cell 3 over frequency 1 and cell 4 over frequency 2 respectively.
  • HetNet with multiple frequency carriers This kind of network is called as “HetNet with multiple frequency carriers” .
  • Carrier aggregation can be enabled in these co-deployed inter-frequency cells.
  • CCS cross-carrier scheduling
  • Its idea is that different carrier frequencies are allocated to a certain macro cell (cell 2) and a certain small cell (cell 3) respectively as dedicated primary cells (PCells) , and the downlink control channels for secondary cells (SCells) (cell 1 and cell 4) are transmitted in these dedicated primary PCells with explicit carrier indicator. In this way, the inter-cell interference on PCell control channel can be avoided.
  • CRE-area For small cell UEs who lie in an CRE area (we call it CRE-area) : downlink control channels of the dedicated PCell is protected from interference of neighbor cells, which dedicated PCell is called protected cell in general; while the dedicated SCell is not protected for downlink control channels, which is called non-protected cell in general. It should be noted that the technique of CCS aims to provide protection only to downlink control channels to the small cell. More information about CCS can be found in 3GPP TS36.212, E-UTRA Multiplexing and channel coding, such as V11.3.0, June, 2013.
  • one portion inside the original cell border, called non-CRE area
  • the other portion inside the extended cell border and outside the original cell border, called CRE area
  • non-CRE area is of “low-interference” area, and CRE area is of “high-interference, protected” area; over frequency 2, non-CRE area is of “low-interference” area, and CRE area is of “high-interference, non-protected” area.
  • UE In the CRE area, UE can only camp on the protected cell. For the UE who camps in the protected cell in the CRE area, if it has the capability of CA and CCS, it can take data transfer in both the protected cell and the non-protected cell; otherwise, if it has the capability of CA but not CCS, or it has the capability of neither CA nor CCS, it can take data transfer only in the protected cell.
  • UE can camp on either the protected cell or the non-protected cell. And UE can take data transfer in both the protected cell and the non-protected cell as long as it has the capability of CA, regardless of CCS.
  • the macro cell (cell 1) with the same carrier frequency as the protected small cell lacks of necessary downlink control channels, and hence it cannot accommodate UE for camping.
  • the function of CCS is applied to a part of downlink sub frames of cell 1, the macro cell (cell 1) with the same carrier frequency as the protected small cell has limited or weakened capability to accommodate UE for camping.
  • CRE and CCS would result in an area caused by CRE at a certain frequency carrier where the UE is not allowed to access the macro cell or the small cell.
  • the way out for those UEs who are moving toward such area at such frequency carrier is to perform handover to another inter-frequency cell which has been protected by CCS.
  • the existing mobility control method is low efficient and hence causes long interruption time and even high drop rate.
  • a method of mobility management for a user equipment, UE, in a wireless communication network comprising at least a first radio base station, RBS, serving at least a first cell over a first frequency and a second cell over a second frequency, and a second RBS serving at least a third cell over the first frequency and a fourth cell over the second frequency, wherein the first cell and the second cell are macro cells and are overlapped, the third cell and the fourth cell are small cells and are overlapped, the first frequency and the second frequency are different, the third cell and the fourth cell are within the first cell and the second cell, and the third cell is a protected cell.
  • the method comprises: performing intra-frequency measurement for determining whether the UE is within cell range extension, CRE, area of the fourth cell, with a first positive bias for downlink signal quality of the fourth cell being applied for handover triggering condition; in case that the UE connected to the second cell or the fourth cell is within the CRE area of the fourth cell, performing the following steps: performing inter-frequency measurement for a target cell selection, with a second positive bias for downlink signal quality of the third cell being applied for handover triggering condition; and performing handover to the target cell.
  • a user equipment in a wireless communication network, the network comprising at least a first radio base station, RBS, serving at least a first cell over a first frequency and a second cell over a second frequency, and a second RBS serving at least a third cell over the first frequency and a fourth cell over the second frequency, wherein the first cell and the second cell are macro cells and are overlapped, the third cell and the fourth cell are small cells and are overlapped, the first frequency and the second frequency are different, the third cell and the fourth cell are within the first cell and the second cell, and the third cell is a protected cell.
  • RBS radio base station
  • the UE comprises: an intra-frequency measuring component, adapted for performing intra-frequency measurement for determining whether the UE is within cell range extension, CRE, area of the fourth cell, with a first positive bias for downlink signal quality of the fourth cell being applied for handover triggering condition; an inter-frequency measuring component, adapted for performing inter-frequency measurement for a target cell selection with a second positive bias for downlink signal quality of the third cell being applied for handover triggering condition in case that the UE connected to the second cell or the fourth cell is within the CRE area of the fourth cell; and a first handover component, adapted for performing handover to the target cell.
  • an intra-frequency measuring component adapted for performing intra-frequency measurement for determining whether the UE is within cell range extension, CRE, area of the fourth cell, with a first positive bias for downlink signal quality of the fourth cell being applied for handover triggering condition
  • an inter-frequency measuring component adapted for performing inter-frequency measurement for a target cell selection with a second positive bias for downlink signal quality of the third cell being
  • a method of mobility management for a user equipment, UE, in a wireless communication network comprising at least a first radio base station, RBS, serving at least a first cell over a first frequency and a second cell over a second frequency, and a second RBS serving at least a third cell over the first frequency and a fourth cell over the second frequency, wherein the first cell and the second cell are macro cells and are overlapped, the third cell and the fourth cell are small cells and are overlapped, the first frequency and the second frequency are different, the third cell and the fourth cell are within the first cell and the second cell, and the third cell is a protected cell.
  • the method is performed in the RBS and comprises: determining position of the UE in relation to cell range extension, CRE, area of the fourth cell via intra-frequency measurement, with a first positive bias for downlink signal quality of the fourth cell being applied for handover triggering condition; in case that the UE connected to the second cell or the fourth cell is within the CRE area of the fourth cell, performing the following steps: selecting a target cell via at least inter-frequency measurement, with a second positive bias for downlink signal quality of the third cell being applied for handover triggering condition; and commanding the UE to perform handover to the target cell.
  • a radio base station, RBS in a wireless communication network, the network comprising at least a first radio base station, RBS, serving at least a first cell over a first frequency and a second cell over a second frequency, and a second RBS serving at least a third cell over the first frequency and a fourth cell over the second frequency, wherein the first cell and the second cell are macro cells and are overlapped, the third cell and the fourth cell are small cells and are overlapped, the first frequency and the second frequency are different, the third cell and the fourth cell are within the first cell and the second cell, and the third cell is a protected cell.
  • the RBS comprises: a position determiner, adapted for determining position of the UE in relation to cell range extension, CRE, area of the fourth cell via intra-frequency measurement, with a first positive bias for downlink signal quality of the fourth cell being applied for handover triggering condition; a target cell selector, adapted for selecting a target cell via at least inter-frequency measurement, with a second positive bias for downlink signal quality of the third cell being applied for handover triggering condition in case that the UE connected to the second cell or the fourth cell is within the CRE area of the fourth cell; and a first handover commanding component, adapted for commanding the UE to perform handover to the target cell.
  • a position determiner adapted for determining position of the UE in relation to cell range extension, CRE, area of the fourth cell via intra-frequency measurement, with a first positive bias for downlink signal quality of the fourth cell being applied for handover triggering condition
  • a target cell selector adapted for selecting a target cell via at least inter-frequency measurement, with a second
  • a computer program product which comprises the instructions for implementing the steps of the methods as described above.
  • a recording medium which stores instructions for implementing the steps of the methods as described above.
  • a radio network entity comprising: a memory, adapted to store instructions therein; a processing system, adapted to execute the instructions; a network interface, adapted to send and receive data in the wireless communication network; a communication media, adapted for communication between the memory, the processing system and the network interface; wherein: when the instructions are executed in the processing system, cause the processing system to implement the steps of the methods as described above.
  • FIG. 1 illustrates a schematic view of the environment in which embodiments are implemented
  • FIG. 2 illustrates a flowchart of one method performed in a UE in accordance with embodiments of the present invention
  • FIG. 3 illustrates a flowchart of one method performed in an RBS in accordance with embodiments of the present invention
  • FIG. 4 illustrates a flowchart of one method performed in a UE in accordance with embodiments of the present invention
  • FIG. 5 illustrates a flowchart of another method performed in a UE in accordance with embodiments of the present invention
  • FIG. 6 illustrates one deployment of cells in which embodiments are implemented
  • FIG. 7 illustrates another deployment of cells in which embodiments are implemented
  • FIG. 8 illustrates a flowchart of one method performed in an RBS in accordance with embodiments of the present invention
  • FIG. 9 illustrates a flowchart of another method performed in an RBS in accordance with embodiments of the present invention.
  • FIG. 10 illustrates a block diagram of a UE in accordance with embodiments of the present invention.
  • FIG. 11 illustrates a block diagram of an RBS in accordance with embodiments of the present invention.
  • FIG. 12 illustrates a block diagram showing example physical components of a radio network entity in accordance with embodiments of the present invention.
  • the present technology may be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc. ) .
  • the present technology may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system.
  • a computer-usable or computer-readable medium may be any medium that may contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
  • overlap or its transformation describes a scenario that at least two objects totally cover each other, or one is totally in the coverage of the other. Overlapped cells can also be referred to as neighbor cells.
  • Intra-frequency measurement refers to measuring signal quality of cells over the same frequency
  • inter-frequency measurement refers to measuring signal quality of cells over a different frequency.
  • multi-carrier HetNet system comprises at least a macro radio base station (RBS) 101 and a small RBS 102.
  • RBS radio base station
  • a macro RBS 101 is sometimes also referred to in the art as a macro base station, a node B,or B-node, an eNodeB (eNB) , etc. , besides, also other transceivers or wireless communication stations used to communicate with a user equipment (UE) 103.
  • UE user equipment
  • a small RBS 102 is sometimes also referred to in the art as a micro/femto/pico base stations, a micro/femto/pico node B, or micro/femto/pico B-node, a femto/pico eNodeB (eNB) , etc. , besides, also other transceivers or wireless communication stations used to communicate with the UE 103.
  • eNB femto/pico eNodeB
  • each of RBS 101 and RBS 102 is shown as serving one cell over frequency 1 and another cell over frequency 2.
  • Each cell is represented by a circle (with part of the circle not shown in some cells) which surrounds the respective RBS 101 and RBS 102. It will be appreciated by those skilled in the art, however, that an RBS 101 or RBS 102 may serve for communicating across the air interface for more than two cells.
  • cell 1 over frequency 1 and cell 2 over frequency 2 are illustrated as two layers of similar range and two macro RBSs are shown. Actually cell 1 and cell 2 are geographically at least partly overlapped and share the same macro RBS 101. Similarly, just for sake of clarity, cell 3 over frequency 1 and cell 4 over frequency 2 are illustrated as two layers of similar range and two small RBSs are shown. Actually cell 3 and cell 4 are geographically at least partly overlapped and share the same small RBS 102.
  • the two co-deployed cells corresponding to these two frequencies normally have the same coverage size. Otherwise, the co-deployed cells may not have the same coverage size.
  • a UE such as the UE 103 shown in FIG. 1, communicates with one cell or one RBS over an air interface. For simplicity and clarity, there is only one UE moving among different positions. It will be appreciated that different numbers of UEs may be served by those cells at the meantime.
  • the term “UE” used herein may indicate all forms of devices enabled to communicate via a radio communication network, such as mobile telephones ( “cellular" telephones) and laptops with mobile termination, and thus can be, for example, portable, pocket, hand-held devices, such as mobile phones, smart phones, personal digital assistants (PDA) ; computer-included devices, such as desktops, laptops; vehicles, or other devices, such as meters, household appliances, medical appliances, multimedia devices, etc. , which communicate voice and/or data with radio access network.
  • cellular mobile telephones
  • PDA personal digital assistants
  • CCS and CRE are applied to the system of FIG. 1.
  • Two small circles are shown around the small RBS 102 over each frequency, wherein the inner circle is original border of cell 3 or cell 4, while the outer circle is extended border of cell 3 or cell 4.
  • the CRE area comprises both the original cell border and the extended cell border and we define that cell 2 and cell 3 are PCells while cell 1 and cell 4 are SCells in the embodiments described herein.
  • the UE who stay at CRE area should camp on the protected small cell.
  • CIO cell individual offset
  • This UE performs the second handover to the overlapped inter-frequency small cell (cell 3) , triggered by e.g. inter-frequency A3 event with 6dB CIO bias. Though this UE finally arrives at the protected cell, the experienced two-step handover would cause longer interruption time.
  • 3GPP TS 36.331 defines a series of events, wherein Event A1 defines that measurement in the Serving cell becomes better than threshold, Event A2 defines that measurement in the serving cell becomes worse than threshold, Event A3 defines that measurement in neighbor cell becomes offset better than that in PCell, Event A4 defines that measurement in neighbor cell becomes better than threshold, Event A5 defines that measurement in PCell becomes worse than threshold 1 and measurement in neighbor cell becomes better than threshold 2, and Event A6 defines measurement in neighbor cell becomes offset better than SCell.
  • the border of non-protected area includes the outer border where signal quality value of the macro cell is equal to the signal quality value of the small cell plus a CRE bias and the inner border where the signal quality value of the macro cell is equal to the signal quality value of the small cell.
  • macro RBS or small RBS investigates signal quality of inter-frequency cells, including another macro cell and another small cell, by configuring the UE to measure signal qualities of the inter-frequency overlapped cells, with another CRE bias as CIO bias for the small cell.
  • Metrics of signal qualities could be reference signal received power (RSRP) , reference signal received quality (RSRQ) or other metrics considering signal strengths of the serving cell and/or overlapped cells.
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • the macro RBS or small RBS selects the inter-frequency cell which has the best biased signal quality as the target cell.
  • the “biased” signal quality of the macro cell equals raw value of the signal quality value, while the biased signal quality of the small cell equals raw value of the signal quality plus CRE bias.
  • the serving RBS commands the UE to perform handover to the selected target cell.
  • a method of mobility control performed in UE 103 is described as follows.
  • the UE 103 performs intra-frequency measurement for determining whether the UE 103 is within CRE area of cell 4, with a CRE bias for downlink signal quality of cell 4 being applied for handover triggering condition.
  • the UE 103 performs the following steps: it performs inter-frequency measurement for a target cell selection at step 202, with another CRE bias for downlink signal quality of cell 3 being applied for handover triggering condition; and it performs handover to the target cell at step 203.
  • the RBS 102 determines position of the UE in relation to CRE area of cell 4 via intra-frequency measurement, with a CRE bias for downlink signal quality of cell 4 being applied for handover triggering condition.
  • the UE 103 connected to cell 2 or cell 4 is within the CRE area of cell 4, performing the following steps: it selects a target cell via at least inter-frequency measurement at step 302, with another CRE bias for downlink signal quality of cell 3 being applied for handover triggering condition; then it commands the UE to perform handover to the target cell at step 303.
  • FIG. 4 illustrates a flowchart of one method performed in a UE in accordance with embodiments of the present invention.
  • the UE 103 is initially connected to cell 4 and moves towards the macro RBS 101.
  • the UE 103 performs intra-frequency measurement for determining its position in relation to CRE area of cell 4. It is noted when the UE 103 is within the original cell border of cell 4, signal quality of cell 4 is better than that of cell 2, when the UE 103 locates right on the original cell border of cell 4, signal quality of cell 4 equals that of cell 2.
  • signal quality of cell 2 equals that of cell 4 plus CRE bias of cell 4.
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • the UE 103 When the UE 103 moves into CRE area of cell 4 (with outer border where the signal quality value of cell 2 is equal to the signal quality value of cell 4 plus its CRE bias and the inner border where the signal quality value of cell 1 is equal to the signal quality value of cell 4 included) , it will perform inter-frequency measurement at step 403, i.e., measuring signal qualities of inter-frequency cells of cell 1 and cell 3. It is noted when the UE 103 locates right on the extended cell border of cell 3, signal quality value of cell 1 equals that of cell 3 plus CRE bias of cell 3. When the UE 103 is out of the extended cell border of cell 3, signal quality value of cell 1 is better that of cell 3 plus CRE bias of cell 3.
  • signal quality value of cell 1 is worse than that of cell 3 plus CRE bias of cell 3.
  • such measuring is not necessarily required.
  • the two frequency carriers lie in the same frequency band and each of the common RBS has the same transmit power at these two frequencies, the two co-deployed cells corresponding to these two frequencies normally have the same coverage size. Therefore, the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is right in the “high-interference, protected” CRE area of the protected cell (cell 3) .
  • the two co-deployed cells corresponding to these two frequencies may have different coverage sizes. If the protected cell (cell 3) is larger than the non-protected cell (cell 4),the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is also in the protected cell (cell 3) .
  • FIG. 6 illustrates a deployment of such a scenario, wherein circle 1 stands for original cell border of cell 4, circle 2 stands for original cell border of cell 3,circle 3 stands for extended cell border of cell 4 and circle 4 stands for extended cell border of cell 3.
  • Positions B and C which are between original cell border of cell 4 and extended cell border of cell 4, i.e., CRE area of cell 4, are obviously within circle 4, i.e., cell range (herein cell range refers to original cell range plus CRE area) of cell 3.
  • cell range refers to original cell range plus CRE area
  • FIG. 7 shows that in the deployment of FIG. 7 where the protected cell (cell 3) is smaller than the non-protected cell (cell 4) , things are not necessarily the same.
  • positions A and B both belonging to the CRE area of cell 4 does not ensure them within cell 3, for example, position A is out of cell 3 and thus measuring of the signal qualities of inter-frequency cells of cell 1 and 3 is needed to determine the position in relation to cell 3.
  • signal quality value from cell 1 is not bigger than that from cell 3 plus the CRE bias of cell 3, i.e., the UE 103 within the CRE area of cell 4 is also within cell 3 (extended cell border of cell 3 included) , for example, the UE 103 locates in positions B or C of FIG. 6 or location B of FIG. 7, then cell 3 is selected as the target cell, and the UE 103 will perform handover to cell 3 at step 404.
  • signal quality value from cell 1 is bigger than that from cell 3 plus the CRE bias of cell 3, i.e., the UE 103 within the CRE area of cell 4 is out of cell 3, for example the UE 103 locates in position A of FIG.
  • the process will proceed to two branches: with an additional condition that cell 1 is available being satisfied, the UE 103 will perform handover to cell 1 at step 405, otherwise, the UE will count on the RBS to detect uplink interferences from cell 2 to cell 4. Generally, if the uplink interference from cell 2 to cell 4 is severe, for example, uplink interference strength not less than a predetermined threshold, the UE 103 will just stay in cell 4, and ifthe uplink interference is not severe, for example, uplink interference strength less than a predetermined threshold, the UE 103 will perform handover to cell 2 at step 406.
  • cell 1 is available can be understood as cell 1 is able to accommodate the UE for camping.
  • FIG. 5 illustrates a flowchart of another method performed in a UE in accordance with embodiments of the present invention.
  • the UE 103 is initially connected to cell 2 and moves towards the small RBS 102.
  • the UE 103 performs intra-frequency measurement for determining its position in relation to CRE area of cell 4.
  • the UE is within original cell range of cell 4, for example position D in FIG. 6, it will perform handover to cell 4 at step 502.
  • the UE 103 When the UE 103 moves into CRE area of cell 4 (with outer border where the signal quality value of cell 2 is equal to the signal quality value of cell 4 plus its CRE bias and the inner border where the signal quality value of cell 1 is equal to the signal quality value of cell 4 included) , it will perform inter-frequency measurement at step 503, i.e., measuring signal qualities of inter-frequency cells of cell 1 and cell 3. It is noted when the UE 103 locates right on the extended cell border of cell 3, signal quality value of cell 1 equals that of cell 3 plus CRE bias of cell 3. When the UE 103 is out of the extended cell border of cell 3, signal quality value of cell 1 is better that of cell 3 plus CRE bias of cell 3.
  • signal quality value of cell 1 is worse that of cell 3 plus CRE bias of cell 3.
  • such measuring is not necessarily required.
  • the two frequency carriers lie in the same frequency band and each of the common RBS has the same transmit power at these two frequencies, the two co-deployed cells corresponding to these two frequencies normally have the same coverage size. Therefore, the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is just in the “high-interference, protected” CRE area of the protected cell (cell 3) .
  • the two co-deployed cells corresponding to these two frequencies may have different coverage sizes. If the protected cell (cell 3) is larger than the non-protected cell (cell 4) , the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is also in the protected cell (cell 3) .
  • FIG. 6 illustrates a deployment of such a scenario, wherein circle 1 stands for original cell border of cell 4, circle 2 stands for original cell border of cell 3, circle 3 stands for extended cell border of cell 4 and circle 4 stands for extended cell border of cell 3.
  • Positions B and C which are between original cell border of cell 4 and extended cell border of cell 4, i.e., CRE area of cell 4, are obviously within circle 4, i.e., cell range (herein cell range refers to original cell range plus CRE area) of cell 3.
  • cell range refers to original cell range plus CRE area
  • FIG. 7 positions A and B both belonging to the CRE area of cell 4 does not ensure them within cell 3, for example, position A is out of cell 3 and thus measuring of the signal quality values of inter-frequency cells of cell 1 and 3 is needed to determine the position in relation to cell 3.
  • signal quality value from cell 1 is not bigger than that from cell 3 plus the CRE bias of cell 3, i.e., the UE 103 within the CRE area of cell 4 is also within cell 3 (extended cell border of cell 3 included) , for example, the UE 103 locates in positions B or C of FIG. 6 or location B of FIG. 7, then cell 3 is selected as the target cell, and the UE 103 will perform handover to cell 3 at step 504.
  • signal quality value from cell 1 is bigger than that from cell 3 plus the CRE bias of cell 3, i.e., the UE 103 within the CRE area of cell 4 is out of cell 3, for example the UE 103 locates in position A of FIG.
  • the process will proceed to two branches: with an additional condition that cell 1 is available being satisfied, the UE 103 will perform handover to cell 1 at step 505, otherwise, the UE will count on RBS to detect uplink interferences from cell 2 to cell 4 .
  • the uplink interference from cell 2 to 4 is not severe, for example, uplink interference strength less than a predetermined threshold, the UE 103 will just stay in cell 2, and ifthe uplink interference is severe, for example, uplink interference strength not less than a predetermined threshold, the UE 103 will perform handover to cell 4 at step 506.
  • cell 1 is available can be understood as cell 1 is able to accommodate the UE for camping.
  • FIGs. 4 and 5 can be totally under the control of the macro RBS 101 or the small RBS 102, which will be described with reference to FIGs. 8 and 9 below.
  • the process of FIGs. 4 and 5 can also be partly under the control of the macro RBS 101 or the small RBS 102, for example, intra-frequency measurement or inter-frequency measurement can be initiated by the UEs themselves while handover can be guided by the RBS, or vice versa.
  • FIG. 8 illustrates a flowchart of one method performed in an RBS in accordance with embodiments of the present invention.
  • the UE 103 is initially connected to cell 4 and moves towards the macro RBS 101.
  • the small RBS 102 commands UE to perform intra-frequency measurement for determining its position in relation to CRE area of cell 4. This can be done, for example, by configuring the UE 103 with Event A3 intra-frequency measurement towards the intra-frequency cell (cell 2) .
  • Event A3 defines “neighbor becomes offset better than PCell” , here offset equals to the original A3-offset plus cell-individual-offset.
  • Such an event will trigger a measurement report (say, with Measurement-ID being 1) with the measured signal quality sending from the UE 103 to the small RBS 102.
  • the small RBS 102 will command the UE 103 to perform handover to cell 2 at step 802.
  • the small RBS 102 When the UE 103 moves into CRE area of cell 4 (with outer border where the signal quality value of cell 2 is equal to the signal quality value of cell 4 plus its CRE bias and the inner border where the signal quality value of cell 1 is equal to the signal quality value of cell 4 included) , prompted by a measurement report of Measurement-ID 1 being received from the UE 103, the small RBS 102 will configure the UE 103 to perform inter-frequency measurement for determining its position in relation to cell 3 at step 803, i.e., measuring signal qualities of inter-frequency cells of cell 1 and cell 3. This can be done by configuring the UE 103 with Event A4 inter-frequency measurement towards the inter-frequency cells of cell 3 and cell 1.
  • Event A4 defines “measurement in neighbor cell becomes better than threshold” , here threshold is set to either an empirical value above which the data transfer is available in the cellular network or the minimum value of-140dBm regulated by 3GPP [36.331] . Such an event will trigger a measurement report (say, with Measurement-ID being2) with the measured signal qualities sending from the UE 103 to the small RBS 102. This can also be done by configuring the UE 103 with Event A5 inter-frequency measurement towards the inter-frequency cells of cell 3 and cell 1.
  • Event A5 defines “measurement in PCell becomes worse than threshold 1 and measurement in neighbor cell becomes better than threshold 2” , here threshold 1 is set to a large value so that “PCell becomes worse than threshold 1” always holds true and the other parameters are set similarly to that in the Event A4.
  • signal quality value of cell 1 equals that of cell 3 plus CRE bias of cell 3.
  • signal quality value of cell 1 is better that of cell 3 plus CRE bias of cell 3.
  • signal quality value of cell 1 is worse that of cell 3 plus CRE bias of cell 3.
  • the small RBS 102 will determine relationship of signal quality value of cell 1, cell 2 and CRE bias of cell 3 sent in the measurement reports, i.e., the position of the UE 103 in relation to cell 3 based on the measured signal qualities.
  • the position in relation to cell 3 can be determined without any measured signal qualities sent in measurement report of Measurement-ID 2.
  • the two frequency carriers lie in the same frequency band and have the same transmit power both in macro cells and small cells, the two co-deployed cells normally have the same coverage size.
  • the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is just in the “high-interference, protected” CRE area of the protected cell (cell 3) .
  • the two co-deployed cells corresponding to these two frequencies may have different coverage sizes. Ifthe protected cell (cell 3) is larger than the non-protected cell (cell 4) , the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is also in the protected cell (cell 3) .
  • FIG. 6 illustrates a deployment of such a scenario, wherein circle 1 stands for original cell border of cell 4, circle 2 stands for original cell border of cell 3, circle 3 stands for extended cell border of cell 4 and circle 4 stands for extended cell border of cell 3. Positions B and C,which are between original cell border of cell 4 and extended cell border of cell 4, i.e., CRE area of cell 4, are obviously within circle 4, i.e., cell range (herein cell range refers to original cell range plus CRE area) of cell 3. However, in the deployment of FIG. 7 where the protected cell (cell 3) is smaller than the non-protected cell (cell 4) , things are not necessarily the same. In the scenario of FIG. 7, positions A and B both belonging to the CRE area of cell 4 does not ensure them being within cell 3, for example, position A is out of cell 3 and thus measuring of the signal quality values of inter-frequency cells of cell 1 and 3 is needed to determine the position in relation to cell 3.
  • the small RBS 102 will select cell 3 as the target cell, and command UE 103 to perform handover to cell 3 at step 804.
  • the UE 103 locates in position A of FIG.
  • the process will proceed to determine availability of cell 1 at step 805.
  • availability of cell 1 can be understood as ability of cell 1 to accommodate UE for camping. If the function of CCS is applied to all downlink sub frames of cell 1, then cell 1 with the same carrier frequency as the protected small cell (cell 3) lacks of necessary downlink control channels, and hence it cannot accommodate UE 103 for camping. If the function of CCS is applied to a part of downlink sub frames of cell 1, then cell 1 with the same carrier frequency as the protected small cell (cell 3) has limited or weakened capability to accommodate UE 103 for camping.
  • the small RBS 102 will select cell 1 as the target cell and command the UE 103 to perform handover to cell 1 at step 806, otherwise, the small RBS 102 will determine uplink interferences from cell 2 to cell 4 at step 807.
  • the uplink interference is severe, for example, uplink interference strength not less than a predetermined threshold
  • the UE 103 will preferably just stay in cell 4
  • the small RBS 102 will select cell 2 as the target cell and configure the UE 103 to perform handover to cell 2 at step 808.
  • FIG. 9 illustrates a flowchart of another method performed in an RBS in accordance with embodiments of the present invention.
  • the UE 103 is initially connected to cell 2 and moves towards the small RBS 102.
  • the small RBS 102 commands UE to perform intra-frequency measurement for determining its position in relation to CRE area of cell 4. This can be done, for example, by configuring the UE 103 with Event A3 intra-frequency measurement towards the intra-frequency cell (cell 4) .
  • Event A3 defines “neighbor becomes offset better than PCell” , here offset equals to the original A3-offset plus to cell-individual-offset.
  • Such an event will trigger a measurement report (say, with Measurement-ID being 3) with the measured signal qualities sending from the UE 103 to the macro RBS 101.
  • the macro RBS 101 will command the UE 103 to perform handover to cell 4 at step 902.
  • the macro RBS 101 When the UE 103 moves into CRE area of cell 4 (with outer border where the signal quality value of cell 2 is equal to the signal quality value of cell 4 plus its CRE bias and the inner border where the signal quality value of cell 1 is equal to the signal quality value of cell 4 included) , prompted by a measurement report of Measurement-ID 3 being received from the UE 103, the macro RBS 101 will configure the UE 103 to perform inter-frequency measurement for determining its position in relation to cell 3 at step 903 i.e., measuring signal qualities of inter-frequency cells of cell 1 and cell 3. This can be done by configuring the UE 103 with Event A4 inter-frequency measurement towards the inter-frequency cells of cell 3 and cell 1.
  • Event A4 defines “measurement in neighbor cell becomes better than threshold” , here threshold is set to either an empirical value above which the data transfer is available in the cellular network or the minimum value of-140dBm regulated by 3GPP [36.331] . Such an event will trigger a measurement report (say, with Measurement-ID being 4) with measured signal qualities sending from the UE 103 to the macro RBS 101. This can also be done by configuring the UE 103 with Event A5 inter-frequency measurement towards the inter-frequency cells of cell 3 and cell 1.
  • Event A5 defines “measurement in PCell becomes worse than threshold 1 and measurement in neighbor cell becomes better than threshold 2” , here threshold 1 is set to a large value so that “PCell becomes worse than threshold 1” always holds true and the other parameters are set similarly to that in the Event A4.
  • signal quality value of cell 1 equals that of cell 3 plus CRE bias of cell 3.
  • signal quality value of cell 1 is better that of cell 3 plus CRE bias of cell 3.
  • signal quality value of cell 1 is worse than that of cell 3 plus CRE bias of cell 3.
  • the macro RBS 101 will determine relationship of signal quality value of cell 1, cell 2 and CRE bias of cell 3 sent in the measurement reports, i.e., the position of the UE 103 in relation to cell 3 based on the measured signal qualities.
  • the position in relation to cell 3 can be determined without any measured signal qualities sent in measurement report (say, with Measurement-ID being 4) .
  • the two frequency carriers lie in the same frequency band and each of the common RBS has the same transmit power at these two frequencies, the two co-deployed cells corresponding to these two frequencies normally have the same coverage size.
  • the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is just in the “high-interference, protected” CRE area of the protected cell (cell 3) .
  • the two co-deployed cells corresponding to these two frequencies may have different coverage sizes. If the protected cell (cell 3) is larger than the non-protected cell (cell 4),the UE 103 who is in the “high-interference, non-protected” CRE area of the non-protected cell (cell 4) is also in the protected cell (cell 3) .
  • circle 1 stands for original cell border of cell 4
  • circle 2 stands for original cell border of cell 3
  • circle 3 stands for extended cell border of cell 4
  • circle 4 stands for extended cell border of cell 3.
  • Positions B and C which are between original cell border of cell 4 and extended cell border of cell 4, i.e., CRE area of cell 4, are obviously within circle 4, i.e., cell range (herein cell range refers to original cell range plus CRE area) of cell 3.
  • cell range refers to original cell range plus CRE area
  • FIG. 7 where the protected cell (cell 3) is smaller than the non-protected cell (cell 4)
  • positions A and B both belonging to the CRE area of cell 4 does not ensure them within cell 3, for example, position A is out of cell 3 and thus measuring of the signal qualities of inter-frequency cells of cell 1 and 3 is needed to determine the position in relation to cell 3.
  • the macro RBS 101 will select cell 3 as the target cell, and command UE 103 to perform handover to cell 3 at step 904.
  • the UE 103 locates in position A of FIG.
  • the process will proceed to determine availability of cell 1 at step 905.
  • availability of cell 1 can be understood as ability of cell 1 to accommodate UE for camping. If the function of CCS is applied to all downlink sub frames of cell 1, then cell 1 with the same carrier frequency as the protected small cell (cell 3) lacks of necessary downlink control channel, and hence it cannot accommodate UE 103 for camping. If the function of CCS is applied to a part of downlink sub frames of cell 1, then cell 1 with the same carrier frequency as the protected small cell (cell 3) has limited or weakened capability to accommodate UE 103 for camping.
  • the macro RBS 101 will select cell 1 as the target cell and command the UE 103 to perform handover to cell 1 at step 906, otherwise, the macro RBS 101 will determine detect uplink interferences from cell 2 to cell 4 at step 907. Generally, if the uplink interference is not severe, for example, uplink interference strength less than a predetermined threshold, the UE 103 will preferably just stay in cell 2, and if the uplink interference is severe, for example, uplink interference strength not less than a predetermined threshold, the macro RBS 101 will select cell 4 as the target cell and configure the UE 103 to perform handover to cell 4 at step 908.
  • FIG. 10 illustrates a block diagram of a UE 1000 in accordance with embodiments of the present invention.
  • the UE 103 is served in the system of FIG. 1.
  • the UE 103 comprises an intra-frequency measuring component 1001, an inter-frequency measuring component 1002, a first handover component 1003, a second handover component 1004, and a third handover controller 1005.
  • the UE 103 is not limited to the shown elements, and can comprise other conventional elements and additional elements implemented for other purposes.
  • the intra-frequency measuring component 1001 is adapted for performing intra-frequency measurement for determining whether the UE is within cell range extension, CRE, area of cell 4, with a CRE bias for downlink signal quality of cell 4 being applied for handover triggering condition;
  • the inter-frequency measuring component 1002 is adapted for performing inter-frequency measurement for a target cell selection with another CRE bias for downlink signal quality of cell 3 being applied for handover triggering condition in case that the UE connected to cell 2 or cell 4 is within the CRE area of cell 4;
  • the first handover component 1003 is adapted for performing handover to the target cell;
  • the second handover component 1004 is adapted for performing handover to cell 4 in case that the UE is connected to cell 2 and a first parameter indicating signal quality from cell 2 is smaller than that from cell 4;
  • the third handover component 1005 is adapted for performing handover to cell 2 in case that the UE is connected to cell 4, and .
  • the first parameter indicating signal quality from cell 2 is larger than that from cell 4 plus the
  • the elements 1001-1005 are illustrated as separate elements in FIG. 10.However, this is merely to indicate that the functionalities are separated.
  • the elements can be provided as separate hardware devices. However, other arrangements are possible, such as the first handover component 1003, the second handover component 1004 and the third handover component 1005 can be physically combined as one unit. Any combination of the elements can be implemented in any combination of software, hardware, and/or firmware in any suitable location. For example, there may be more controllers configured separately, or just one controller for all the controls.
  • the elements may constitute machine-executable instructions embodied within a machine, e.g., readable medium, which when executed by a machine will cause the machine to perform the operations described.
  • any of the elements may be implemented as hardware, such as an application specific integrated circuit (ASIC) , Digital Signal Processor (DSP) , Field Programmable Gate Array (FPGA) or the like.
  • ASIC application specific integrated circuit
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • steps 401 and 501 are taken in the intra-frequency measuring component 1001
  • step 402 is taken in third handover component 1005
  • step 502 is taken in second handover component 1004
  • steps 403 and 503 are taken in the inter-frequency measuring component 1002
  • steps 404, 504, 405, 505, 406 and 506 are taken in the first handover component 1003.
  • FIG. 11 illustrates a block diagram of an RBS 1100 in accordance with embodiments of the present invention.
  • the RBS 1100 is serving in the system of FIG. 1.
  • the RBS comprises a position determiner 1101, a target cell selector 1102, a first handover commanding component 1103, an availability determining component 1104, an uplink interference determining component 1105, a second handover commanding component 1106, and a third handover commanding component 1107.
  • the position determiner 1101 is adapted for determining position of the UE in relation to area of cell 4 via intra-frequency measurement, with a CRE bias for downlink signal quality of cell 4 being applied for handover triggering condition;
  • the target cell selector 1102 is adapted for selecting a target cell via at least inter-frequency measurement, with another CRE bias for downlink signal quality of cell 3 being applied for handover triggering condition in case that the UE connected to cell 2 or cell 4 is within the CRE area of cell 4;
  • the first handover commanding component 1103 is adapted for commanding the UE to perform handover to the target cell;
  • an availability determining component 1104 adapted for determining availability of cell 1 in case that the UE connected to cell 4 or cell 2 is within the CRE area of cell 4 and meanwhile a second parameter indicating signal quality from cell 1 is bigger than that from cell 3 plus the CRE bias of cell 3, wherein the target cell selector is adapted to select cell 1 as the target cell in case that cell 1 is available;
  • the elements 1101-1107 are illustrated as separate elements in FIG. 11.However, this is merely to indicate that the functionalities are separated.
  • the elements can be provided as separate hardware devices. However, other arrangements are possible, such as the elements 1104-1105 can be physically combined into element 1102 as one unit. Any combination of the elements can be implemented in any combination of software, hardware, and/or firmware in any suitable location.
  • the elements may constitute machine-executable instructions embodied within a machine, e.g., readable medium, which when executed by a machine will cause the machine to perform the operations described.
  • any of the elements may be implemented as hardware, such as an application specific integrated circuit (ASIC) , Digital Signal Processor (DSP) , Field Programmable Gate Array (FPGA) or the like.
  • ASIC application specific integrated circuit
  • DSP Digital Signal Processor
  • FPGA Field Programmable Gate Array
  • steps 801 and 901 are taken in the position determiner 1101; step 802 is taken in the third handover commanding component 1107; step 902 is taken in the second handover commanding component 1106; steps 804, 806, 808, 904, 906, and 908 are taken in the target cell selector 1102 in combination with the first handover commanding component 1103; steps 803 and 903 are also taken in the target cell selector 1102; steps 805 and 905 are taken in the availability determining component 1104, steps 807 and 907 are taken in the uplink interference determining component 1105.
  • FIG. 12 illustrates a block diagram showing example physical components of a radio network entity 1200 in accordance with embodiments of the present invention.
  • the macro RBS 101, small RBS 102, or the UE 103, according to the present invention, as a radio network entity, has components similar to those of the radio network entity 1200. It should be appreciated that these radio network entities can be implemented using components other than those illustrated in the example of Figure 1 0.
  • the radio network entity 1200 comprises a memory 1201, a processing system 1202, a network interface 1203, and a communication medium 1204.
  • the memory 1201 includes one or more than one computer-usable or computer-readable storage medium capable of storing data and/or computer-executable instructions. Is should be appreciated that the storage medium is preferably a non-transitory storage medium.
  • the processing system 1202 includes one or more than one processing unit.
  • a processing unit is a physical device or article of manufacture comprising one or more integrated circuits that read data and instructions from computer readable media, such as the memory 1201, and selectively execute the instructions.
  • the processing system 1202 is implemented in various ways.
  • the processing system 1202 can be implemented as one or more than one processing core.
  • the processing system 1202 can comprise one or more than one separate microprocessor.
  • the processing system 1202 can comprise an application-specific integrated circuit (ASIC) that provides specific functionality.
  • ASIC application-specific integrated circuit
  • the processing system 1202 provides specific functionality by using an ASIC and by executing computer-executable instructions.
  • the network interface 1203 is a device or article of manufacture that enables the radio network entity 1200 to send data to or receive data from other radio network entities.
  • the network interface 1203 is implemented in different ways.
  • the network interface 1203 can be implemented as an Ethernet interface, a token-ring network interface, a fiber optic network interface, a wireless network interface (e.g., Wi-Fi, WiMax, etc. ) , or another type of network interface.
  • the communications medium 1204 facilitates communication among the hardware components of the network device 1200.
  • the communications medium 1204 facilitates communication among the memory 1201, the processing system 1202, and the network interface 1203.
  • the communications medium 1204 can be implemented in various ways.
  • the communications medium 1204 can comprise a PCI bus, a PCI Express bus, an accelerated graphics port (AGP) bus, a serial Advanced Technology Attachment (ATA) interconnect, a parallel ATA interconnect, a Fiber Channel interconnect, a USB bus, a small Computing system Interface (SCSI) interface, or another type of communications medium.
  • the memory 1201 stores various types of data and/or software instructions.
  • the instructions in the memory 1201 can include those that when executed in the processing system, cause the network device 1200 to implement the methods described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent des procédés et des dispositifs de gestion de la mobilité d'équipements d'utilisateurs dans un réseau hétérogène (HetNet) à porteuses multiples. Selon lesdits procédés, des mesures intra-fréquence et inter-fréquence sont effectuées de manière séquentielle pour déterminer une cellule cible en vue d'un transfert.
PCT/CN2015/070856 2015-01-16 2015-01-16 Procédé et dispositif de gestion de mobilité Ceased WO2016112530A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US15/532,178 US9980196B2 (en) 2015-01-16 2015-01-16 Method and device for mobility control
PCT/CN2015/070856 WO2016112530A1 (fr) 2015-01-16 2015-01-16 Procédé et dispositif de gestion de mobilité
CN201580073567.4A CN107431975B (zh) 2015-01-16 2015-01-16 用于移动性控制的方法和装置
EP15877449.7A EP3245817A4 (fr) 2015-01-16 2015-01-16 Procédé et dispositif de gestion de mobilité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2015/070856 WO2016112530A1 (fr) 2015-01-16 2015-01-16 Procédé et dispositif de gestion de mobilité

Publications (1)

Publication Number Publication Date
WO2016112530A1 true WO2016112530A1 (fr) 2016-07-21

Family

ID=56405130

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/070856 Ceased WO2016112530A1 (fr) 2015-01-16 2015-01-16 Procédé et dispositif de gestion de mobilité

Country Status (4)

Country Link
US (1) US9980196B2 (fr)
EP (1) EP3245817A4 (fr)
CN (1) CN107431975B (fr)
WO (1) WO2016112530A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3761705A4 (fr) * 2018-05-29 2021-09-08 ZTE Corporation Procédé, appareil et système de traitement d'interférences et support d'informations

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10667196B2 (en) * 2015-06-08 2020-05-26 Mitsubishi Electric Corporation Mobile station, base station, maintenance device, mobile communication system and handover position determination method
US10491352B1 (en) * 2016-10-27 2019-11-26 Sprint Spectrum L.P. Configuring reference-signal transmission in a wireless communication system based on azimuths and distances
CN116095741A (zh) 2020-05-30 2023-05-09 华为技术有限公司 一种信道测量方法及装置
US11510200B2 (en) * 2020-08-21 2022-11-22 At&T Intellectual Property I, L.P. Methods, systems, and devices for traffic management over dual connectivity mobile networks
US20230413111A1 (en) * 2022-06-15 2023-12-21 Microsoft Technology Licensing, Llc Repurposing mobility management with virtual radio in software radio access networks

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101790212A (zh) * 2009-01-23 2010-07-28 华为技术有限公司 选择目标小区的方法及网络节点
CN102197677A (zh) * 2008-10-30 2011-09-21 Lg电子株式会社 在无线通信系统中的切换和基站信息传输的方法
CN102215538A (zh) * 2010-04-12 2011-10-12 中兴通讯股份有限公司 小区切换或重建过程中的测量任务配置方法及系统
WO2011141073A1 (fr) * 2010-05-11 2011-11-17 Panasonic Corporation (re)sélection de cellule dans un système de communication mobile hétérogène
US20140079026A1 (en) 2011-05-12 2014-03-20 Telefonaktiebolaget L M Ericsson (Publ) Methods in base stations, base stations, computer programs and computer program products
WO2014168539A1 (fr) * 2013-04-08 2014-10-16 Telefonaktiebolaget L M Ericsson (Publ) Procédés permettant d'effectuer des mesures inter-fréquences en état de repos

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8588759B2 (en) * 2007-08-14 2013-11-19 Telefonaktiebolaget Lm Ericsson (Publ) Cell identifier conflict avoidance
US8605684B2 (en) * 2010-01-08 2013-12-10 Blackberry Limited System and method for coordinated multi-point network operation to reduce radio link failure
US8600393B2 (en) * 2010-10-04 2013-12-03 Samsung Electronics Co. Ltd. Methods and apparatus for enabling interference coordination in heterogeneous networks
WO2012093888A2 (fr) * 2011-01-07 2012-07-12 주식회사 팬택 Dispositif et procédé permettant de sélectionner une cellule dans un système de communication sans fil
AU2012204223A1 (en) * 2011-01-07 2013-08-22 Interdigital Patent Holdings, Inc. Communicating channel state information (CSI) of multiple transmission points
CN102196415B (zh) * 2011-05-10 2014-01-08 新邮通信设备有限公司 对空闲模式下的终端触发干扰协调的方法和设备
KR101896001B1 (ko) * 2011-07-12 2018-09-06 한국전자통신연구원 이종 네트워크 환경에서 단말의 이동성 관리 방법
WO2013112090A2 (fr) * 2012-01-25 2013-08-01 Telefonaktiebolaget L M Ericsson (Publ) Procédés et appareils de transfert intercellulaire dans des réseaux hétérogènes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102197677A (zh) * 2008-10-30 2011-09-21 Lg电子株式会社 在无线通信系统中的切换和基站信息传输的方法
CN101790212A (zh) * 2009-01-23 2010-07-28 华为技术有限公司 选择目标小区的方法及网络节点
CN102215538A (zh) * 2010-04-12 2011-10-12 中兴通讯股份有限公司 小区切换或重建过程中的测量任务配置方法及系统
WO2011141073A1 (fr) * 2010-05-11 2011-11-17 Panasonic Corporation (re)sélection de cellule dans un système de communication mobile hétérogène
US20140079026A1 (en) 2011-05-12 2014-03-20 Telefonaktiebolaget L M Ericsson (Publ) Methods in base stations, base stations, computer programs and computer program products
WO2014168539A1 (fr) * 2013-04-08 2014-10-16 Telefonaktiebolaget L M Ericsson (Publ) Procédés permettant d'effectuer des mesures inter-fréquences en état de repos

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
HUAWEI: "3GPP Draft, R2-122133", 15 May 2012, MOBILE COMPETENCE CENTRE, article "Enhancement of inter-frequency elCIC for CA Measurement"
See also references of EP3245817A4
ZTE CORPORATION: "3GPP Draft, R2-122238_SCELL_MEASUREMENT", 15 May 2012, MOBILE COMPETENCE CENTRE, article "SCell Measurement Restriction"

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3761705A4 (fr) * 2018-05-29 2021-09-08 ZTE Corporation Procédé, appareil et système de traitement d'interférences et support d'informations

Also Published As

Publication number Publication date
US20170318516A1 (en) 2017-11-02
US9980196B2 (en) 2018-05-22
CN107431975B (zh) 2020-11-06
EP3245817A1 (fr) 2017-11-22
CN107431975A (zh) 2017-12-01
EP3245817A4 (fr) 2018-08-15

Similar Documents

Publication Publication Date Title
US11877246B2 (en) Uplink power control for SRS carrier-based switching
EP3539320B1 (fr) Mesures d'inter-fréquences sur des scells fs3
EP3254492B1 (fr) Procédure de mesurage sous séparation de fréquence adaptative
EP3304967B1 (fr) Noeud de réseau radio, dispositif sans fil et procédés réalisés dans ceux-ci
EP2385723B1 (fr) Procédé de gestion de configuration d'espace de mesure et son dispositif de communication
US9042835B2 (en) Measurement handling with carrier aggregation
US10440600B2 (en) Providing measurement reports
US9980196B2 (en) Method and device for mobility control
US10178573B2 (en) Methods, network node and wireless device for managing operational behavior of wireless device after measurement gap
US10201025B2 (en) Carrier selection for device-to-device measurements
US20170048917A1 (en) Method and device for transmitting and receiving discovery signal
EP3607768B1 (fr) Procédé de limitation de la mesure de faisceau nécessaire dans une resélection de cellule
US20190230546A1 (en) User equipment and transmission method
TW201526675A (zh) 為了改進涵蓋範圍平衡性的用於跨小區載波聚合之系統及方法
US20130329596A1 (en) Radio communication system, radio base station, and communication control method
US11259287B2 (en) Methods and apparatus relating to synchronization sequence detection in a wireless communication network
JP6545809B2 (ja) 適応型周波数分離に基づく測定手順
WO2016120660A1 (fr) Changement de cellule en fonction de la qualité de modulation

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15877449

Country of ref document: EP

Kind code of ref document: A1

REEP Request for entry into the european phase

Ref document number: 2015877449

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 15532178

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE